Safety attachment for locks



Jan. 10, 1928. T

L. C. SCHMIDT SAFETY ATTACHMENT FOR LOCKS Filed May 1927 2 Sheets-Sheetl Jan. 10, 1928. 1,655,975

, c. SCHMIDT SAFETY ATTACHMENT FOR LOCKS Filed May 2. 1927ZKSheeas-Sheet 2 Ill.)

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tll'lEl.) STATES ."lTiYEUIiTIlIlAS C. SCIEEMIDJT, [1F llEllO'lTIFJlTON,

p ATTACHMENT FOR LOCKd.

application filed May 2, 1927.

This invention relates to new and useful irnprorcinents in a safetyattachment for locks.

tine ohjcct of the invention is to provide a safety attachment :t'orloclts ol" safes, vaults and the like which is designed il or use inconnection with the usual. con'ihinatien loo 1 and, whereby the lockholts may he sccured agaius' release in certain cases of attemptedlair-glory ot the sate or melt, or of mutilation of, or unauthorixedinterference 'i'vith the combination lock, the invention relatingparticularly to the provision of a pivolally mounted tinnhler associatedwith u the loch her and. normally inactive in combi- .nation with meansadapted to he released in case elf interference with the conil'iinationlock and "which is adapted to engage with and. loch the tu. iler inactive position to rn'event the open ion oi said leer liar and the hellscarried thereh another object otthe invention is to preride a safetyattaclnnent oi? the character descrihed including a pivetally mountedturnhler which will remain idle, or inactive during the normal.operation of the combination lUKlE and will not intertliere with said.operalion hut when, upon unauthorized interlieronce with the(annhinatiol'i mechanism oi? the sale or vault locl; will operate toloch the hells thereo't against release.

ll ith the ahovc and other objects in View ie invention has particularrelation to cor iin novel 'l eaturcs ot construction, opera- 'on andarrangemento'l? parts, an example ol which is given in thisspecification and illustrated in the accompanying drawings, wherein liean'e '1 shows a l ra rginenliar-y inside elevational view of a saledoor showing the coinhina'tioi'i loci; and the safety attachmentinz-aalled and showing; the adjacent part of the sale in section.

leigure 2 shows a cross sectional View thereof taken on the line ofFigure l, and

ll i ure 3 shows a. vertical sectional View lherei taken on the line 3ct Figure 1.

llelerring new rnore particularly to the drawings, wherein like numeralsot reiterence Serial No. 1615,2127.

designate similar parts in each of the figures. the numeral 1 designatesthe sate prop er h av ing the usual. door 52 lunged thereto in the usualWay. Irultalled on the inside of the door is the lock mechanismpresently to he described. The nun'icrals 2-, El, desiegiiate the beltsor plunger-s which are secured to the hell: har land which are disposedto project into aligned holes 5, 5., in the adjzment tacing; of the door(sienna); to lock the sale deer in closed position. 'lthcre is a deadhell; (5 having a hearing; in the door and Whose enter end carries asuitahle lznoh 'l by means o'l? which the dead holt may he turi'icd andwhose inner end has a lined arm 8 whose tree cud works in the hearingnotch S) of the shift her 10, attacl'ied to the her l. The nun'ieral ll.designates the usual combination lock controlling mechanism located onthe inside of the door and W1] ich may he inanipulated hy means of thehand knob 12 on the outside, in CO.lIll')l11lttl()1] with a graduateddial 13. The controlling mechanism 11 looks the shift her 10, andconsequently the bolts 3, 25, against releas in one position, hut whenthe dial has been turned to give its moren'ients a certain order ofl'succession the her is released to permit the lock to he on lockedthrough the hell: (3. The shilft haill) is operatively connected withthe controlling mechanism in the usual and conventional manner.

The coinhination loch rhove descriliiml is ol? .:onventionalconstruction and the safely attachment enihod ving the invention will.now he dcscrilied.

The numerals ll-l Lil, designate transverse hearings attached. to theinside oi the door 2 and in tliese hearings there is a retatahle shaft15, one end ot which has a projecting stud 16 whose free end normallyrests in a hearing 17 in the tree end oi? the release bar 18. The otherend oi this release her is attached to the controlling mechanism 11.,preterahly by means 0t set screws 19, which are litted thcrethrough andscrewed into said controlling mechanism. lllic controlling mechanism 11en'ihodies a conventioi'ial latch 20, and attached to the inside elf thedoor 2 and overlyii'ig said latch is a, release arm one end of which isfree and extends underneath the free end of the release bar 18. Theother end of the shaft 15 has the safety bolts 21, 21, fixed thereto,one of which is adjacent the inside of one bearing 14 and a set screw 22is screwed into said shaft 15 adjacent the inner side of the otherbearing 14 thus preventing the lengthwise movement of said shaft. Thereis a tumbler pivoted to the innerside of the door and designatedgenerally by the numeral 23. This tumbler has the upstanding arm 24aligned between the safety bolts 21 and said tumbler also has a,

lateral finger 25 and opposite this finger is enlarged forming a balanceweight 26 which normally holds the finger 25 against the bolt bar 4 butpermits it to operate in the usual manner, said tumbler operating idlywhen said bolt bar is so operated. When the shaft 15 is held in inactiveposition by the stud 1b the safety bolts 21 extend outwardly atsubstantially right angles to the door but when said stud is released bythe bar 18 the safety bolts fall by gravity and interlock with the arm24 so as to lock the tumbler finger 25 against the bolt bar 4 and tothus prevent the withdrawal of the bolts 3.

When a safe is burglarized it is usually ac complished by forciblydisplacing the controlling mechanism 11 or the latch 20 thereof, so asto release the locking mechanism to permit the operation of the deadbolt When the safety attaclnnent herein described is used upondisplacement of, or interference with, the controlling mechanism 11, orthe latch 20 thereof the release bar 18 will be forced inwardly andreleased from the stud 16 and thereupon the safety bolts 21 will dropdown by gravity into interlocking relation with the arm 24 and thetumbler finger will thereby be locked against the inside of the bolt bar4 and the locking mechanism will thereby be held in locked position.

What I claim is 1. In a lock the combination with a lock bolt, and acontrolling mechanism adapted to secure said bolt in locked position orto release the same to permit operation thereof, of a pivotally mountedtumbler, a safety bolt adapted to interlock with said tumbler when inactive position, a rotatable shaft supporting the safety bolt, meansadapted to hold said safety bolt in inactive position, said meansincluding a holder supported by the controlling mechanism.

2. In a lock the combination with a lock bolt and a controllingmechanism adapted to secure said bolt in locked position, or to re leasethe same to permit operation thereof, said mechanism being subject todisplacement by Violence, of a movably mounted tumbler associated withsaid bolt and operable idly When said bolt is operated, asafety beltadapted, when in active position, to engage with said tumbler, to lockthe tumbler against movement and to thereby lock said lock bolt againstoperation, means adapted to hold said safety bolt in inactive position,said means being carried by said controlling mechanism and having areleasable eoi'inection with said safety bolt.

3. In a lock, the combination with a locl; bolt, and a controllingmechanism, adapted to secure said bolt in locked position, or to releasethe same to permit operation thereof,

of a pivotally mounted tumbler associated with said bolt and adapted tobe locked against movement to prevent the operation of said bolt, asafety device adapted, when in active position, to engage with, andlock, the tumbler against movement, means for holding said safety devicein inactive position, out of engagement with the tumbler, said meansbeing releasable.

4. In a lock the combination with a lock bolt and a controllingmechanism adapted to secure said bolt in lOCl-LCtl position, or torelease the same to permitoperation thereof, of a yieldably mountedmember associated with said bolt and adapted to be locked againstmovement to prevent the operation of said bolt, a safety device adapted,when in active position to engage with and lock the yieldable memberagainst movement and to thereby prevent operation of said lock bolt,means for holding said safcty device in inactive position out ofengagement with said yieldablc member, said means being carried by saidcontrolling mechanism and being releasable to permit said safety deviceto move into active position to lock said yield able men'iber.

5. In a lock, the combination with a lock bolt, and a controllingmechanism adapted to secure said bolt in locked position or to releasethe same to permit operation thereof, of a pivotally mounted tumblerassociated with said bolt and adapted to be locked against movement toprevent the operation of said bolt, a safety device adapted, when inactive position to engage with and lock the tumbler against movement,said safety device includinga rotatable shaft and means carried therebyadapted to interlock with the tumbler, means carried by said controllingmechanisn'i and releasably engaging said shaft to hold the safety devicein inactive position.

(J. In a locl; the combination with a lock bolt bar, and a lockboltatlachcd thereto and controlling mechanism subject to displacementby violence and adapted to secure said bolt in locked position, or torelease the same to permit operation thereof, of a yieldable memberassociated with said bar and adapted to be locked thereagainst toprevent the operation of said bar and bolt carried thereby, saidyieldable member, when released. operating idly, during the operation ofsaid bar, a safety device. adapted, when in active position, to engagewith and look the yiemuble -member against movement, 111ez111sassociated with said controlling mechanism 11.1111 reieasnbly connectedto said safety device and adapted to hold said safety device i111inactive position out of eugegen'lent with said yiehilnble member, andadapted to be released, upon displeeen'mnt, of 511111 controllingmechanism, to permit said safety device to move by gravity into lockingrela- 111011 with said yieldable menilber.

In cesth'nony whereof I have signed my name.

LEONIDAS G. SCHBHD'IX

